Step ladder



FIG. 1 is a front perspective view of the step ladder of our design shown in its unfolded position;

FIG. 2 is a right-side elevation view thereof, the left-side elevation view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front perspective view of the step ladder of our design shown in its folded position;

FIG. 8 is a front elevation view thereof;

FIG. 9 is a rear elevation view thereof;

FIG. 10 is a left-side elevation view thereof;

FIG. 11 is a right-side elevation view thereof;

FIG. 12 is a top plan view thereof; and,

FIG. 13 is a bottom plan view thereof. 

We claim the ornamental design for the step ladder, as shown and described. 